Electrical apparatus.



0. SCHAUMBERG. BLEUTBIOAL APPARATUS. APPLICATION FILED mm; s, 1907.

Patented Feb. 23, 1909.

INVENTOR UNITED STATES PATENT OFFICE.

OTTO SUILUFMBEHU, OF I'IT'IHIH'HG, PENNSYLVANIA, ASSIGXOR TO WESTINGHOUSE ELECTRIC d: MANI'FACTLRING (OMPAX'L A UORP()R.\'1[UN OF PIIXNSYLVANIA.

ELE G'I'RICAL APPARATUS.

Application filed June t3v To all whom it may concern:

Be. it known that l, O'r'ro SCHAUMBERG, a citizen of the United States, and a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and usofullmprovement in Elect rical Apparatus, of which the following is a specification.

My invention. relates to incloscd. electrical apparatus and it has special rclerence to cases or tanks in which alternating current transformers may be col'itained.

The object of my invention is to provide a simple and durable transformer casing. oi such construction as to insure adequate heat radiation.

It is usual to immerse electrical apparatus of certain kinds in suitable insulating and cooling fluids, and containing tanks of various forms have been pro iosed and utilized for this service, among wliich boiler iron or steel tanks, cast iron boxes, and receptacles. constructed partially of cast iron and partially of sheet iron, may be mentioned. The sheet iron portions ol the last named receptacles have usually been corrugated for the purpose of stillcning the structure and increasing the heat-radiating surface of the tanks. On account of the dillicultics experienced in forming large quantities of cor- 1 rugated parts of nnllorni size and shape.

tanks of this type could not be assembled in suitable molds and their ends cast wlthout a considerable expenditure of time and:

money.

According to my present invention. l provide an int-losing casing, mainly of sheet metal. which may be used with any suitable electrical apparatus but which is specially": adapted for use with transformers, its structuro being such that a very large heatradiating surfac is provided without involving the dilliculties heretofore experienced in the use of sheet metal tanks.

In the accompanying dranin". the single figure is a \'l(\\. mainly in elevation but part in l ly lnclosing tank constructed in accordance with my invention.

Referring to the. drawings, a transformer having a magnetizable core member 2. a supporting frame 3 thcrel'or and a winding 4, is inclosed in a fluid-containing tank 5 to which it is secured by an adjustable clamping device 6. The tank comprises a cast iron base 7 and a cast iron crown 8 having a re- Specification of Letters Patent.

in section, of a transformer and its Patented Feb. 23, 1909.

movable cover 8, a sheet metal body portion 2) onto which the base and crown are cast. and a plurality of tubes 1t] which establish colnmnnication between the chambers 11 and 12, formed by the base 7 and the crown 8, respectively. The body member t) may be ol' any suitable shape, but is prel'er ably cylindrical, and the base and crown are i materially larger in diameter than the body member so that they project beyond its walls. The tubes It), are so assembled het'ore the crown and base are cast, as to establish comamnication between the chambers l 11 and 32, exclusive of the body of the tank.

The transformer may preferably be im- 1 mcrscd in oil or other insulating fluid and the i'heat lW'NlLlCOtl by the current traversing its i windings will establish a circulation of insulating Iluid through the body iortion in j one direct ion and back through t to tubes 10, since the large radiating surface of the tubes i tends to keep the liquid at a lower temperature than that which exists within the transformer windings.

While the transformer illustrated is of the shell type, I desiro that my invention shall not be restricted to any special class or y'aricty of electrical apparatus and that only such limitations be imposed as are indicated in the appended claims.

I claim as my invention:

1. A fluid-containing casing for electrical aiparatus having cud enlargements and a p urulity of tubes located outside the body iortion ol" the casing and connecting the enlargcments.

2. The combination with a transformer and a fluid-containing casing therefor having enlargements at the top and bottom, of a body ic en Serial No. 377.958.

l plurality of tubes located outside the portion of the casing and connecting tl largcments. y 3. The combination with a transformer having a magnctixable core member and cur-- rt-|It-comlucting' windings and a Iluio-containing casing therel'or. the ends of the casing constituting expanded chambers or heads, of means for establishing communicatiou between the chambers independently of the body ol the casing.

4. The combination with a. transformer having a magnctizahlc core member and current-conducting windings and a lluid-coutaining casing thcrcl'or, the ends of the casing constituting expanded chambers, of a pluill) rality of tubes located outside the body portion of the casing and connecting the end chambers.

5. The combination with a transformer having a magnetizable core member, and current-conducting windings and a fluid containing casing therefor, the ends of the casing constituting expanded chambers, of tubes equally disposed about the casing body and headed into the chambers for establish-- ing communication between said chambers independently of the body of the casing.

6. The combination with a transformer, of a. casing therefor com rising cast iron end chambers, a sheet metal body member and tubes disposed outside of the sheet metal member for establishing auxiliary communication between the cast iron end chambers.

7. A fluid-containing tank for electrical apparatus having a set of tubes located out- 20 side its body portion and connecting its end portions to provide a circulation of liquid therethrough. i

In testimony whereof, I have hereunto -subscribed my name this 25 day of May, 1907. 25

TTO SOHAUMB J Witnesses: 1

R. J. DEARBORN, BPRIF E 

